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BR25L010FVM-W Datasheet(PDF) 8 Page - Rohm |
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BR25L010FVM-W Datasheet(HTML) 8 Page - Rohm |
8 / 17 page 8/16 BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note By write command, data of EEPROM can be written. As for this command, set CS LOW, then input address and data after write ope code. Then, by making CS HIGH, the EEPROM starts writing. The write time of EEPROM requires time of tE/W (Max 5ms). During tE/W, other than status read command is not accepted. Start CS after taking the last data (D0), and before the next SCL clock starts. At other timing, write command is not executed, and this write command is cancelled. This IC has page write function, and after input of data for 1 byte (8 bits), by continuing data input without starting CS, data up to 16/32*1 bytes can be written for one tE/W. In page write, the insignificant 4/5*2 bit of the designated address is incremented internally at every time when data of 1 byte is input, and data is written to respective addresses. When data of the maximum bytes or higher is input, address rolls over, and previously input data is overwritten. BR25L010/020/040-W=16 bytes at maximum BR25L080/160/320/640-W=32 bytes at maximum * 1 BR25L010/020/040-W=Insignificant 4 bits BR25L080/160/320/640-W=Insignificant 5 bits * 2 A6-A0 A7-A0 BR25L020-W BR25L010-W BR25L040-W A8-A0 A9-A0 A10-A0 BR25L160-W BR25L080-W BR25L320-W A11-A0 BR25L640-W A12-A0 Product number Address length A6-A0 A7-A0 BR25L020-W BR25L010-W BR25L040-W A8-A0 A9-A0 A10-A0 BR25L160-W BR25L080-W BR25L320-W A11-A0 BR25L640-W A12-A0 By read command, data of EEPROM can be read. As for this command, set CS LOW, then input address after read ope code. EEPROM starts data output of the designated address. Data output is started from SCK fall of 15/23*1 clock, and from D7 to D0 sequentially. This IC has increment read function. After output of data for 1 byte (8 bits), by continuing input of SCK, data of the next address can be read. Increment read can read all the addresses of EEPROM. After reading data of the most significant address, by continuing increment read, data of the most insignificant address is read. BR25L010/020/040-W=15 clocks BR25L080/160/320/640-W=23 clocks * 1 Fig. 37 Read command (BR25L010/020/040-W) Fig. 38 Read command (BR25L080/160/320/640-W) 0 00 0 0 0 0 11 A12 ** * A1 A0 12 3 4 5 6 7 8 23 24 30 CS SCK SI SO D6 D7 D0 D1 D2 High-Z Fig.39 Write command (BR25L010/020/040-W) Fig.40 Write command (BR25L080/160/320/640-W) 0 00 00 0 00 1 A1 A12 A0 D7 D6 1 2 3 4 5 6 7 8 23 24 30 31 CS SCK SI SO D2 D1 D0 High-Z * =Don't care * =Don't care * =Don't care * * * 3. Write command (WRITE) 2. Read command (READ) 0 00 0 0 0 11 A4 A5 A6 A7 * 1 A1 A0 12 3 4 5 6 7 8 9 10 11 14 15 16 17 22 CS SCK SI SO D6 D7 D0 D1 D2 High-Z BR25L010/020-W=Don't care BR25L040-W=A8 * 1 0 00 00 0 0 1 A4 A5 A6 A7 A1 A0 D7 D6 1 2 3 4 5 6 7 8 15 16 22 23 CS SCK SI SO D2 D1 D0 High-Z BR25L010/020-W=Don't care BR25L040-W=A8 * 1 * 1 Product number Address length Product number Address length Product number Address length 2010.07 - Rev. B www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. |
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